The main character is an inquisitive girl named Mineko, who has just moved to a new home on a hapless Japanese island at the foot of Mount Fugu. Superstitious locals revere the Sun Cat Nikko, which was until now considered a myth. But recently there were rumors that the cat was seen in the settlement. Mineko tries to unravel the mysteries of a struggling village and restore it to its former glory, while carrying out daily chores and work.